基于典型循环工况，开展了混动汽车能量流测评与分析，研究了针对实际道路运行工况降低能耗的优化方法。首先，对比了循环工况下的整车能量流各效率特征参数；其次，按照不同的运行工况分段区间，得到了WLTC循环工况下发动机、发电机、驱动电机的输入输出功率和运行模式特征；最后，提出了基于工况特征参数挑选代表实际道路运行的典型循环工况实现能耗优化的方法。结果表明：发动机循环综合热效率最高达到了36.79%，市区循环的制动能量回收效率达到了87.04%；高速工况下整车综合效率29.72%，是车辆最节能的工况；针对代表实际道路运行的WLTCLM典型循环工况进行了全局优化，基于仿真验证，整车百公里能耗降低了3.98%。

Based on the typical cycle conditions, the energy flow evaluation and analysis of hybrid electric vehicles was carried out, and the method of reducing energy consumption for actual road operating conditions was studied. The efficiency characteristic parameters of vehicle energy flow under cycle conditions were compared. The input and output power and operating mode characteristics of engine, generator and drive motor under WLTC cycle conditions were then obtained based on the segmentation of different operating conditions. Finally, the substitute method of selected typical cycle conditions for actual road operating conditions was proposed based on the characteristic parameters of operating conditions to achieve the optimization of energy consumption. The results show that the highest cycle comprehensive thermal efficiency of engine reaches 36.79% and the braking energy recovery efficiency of urban cycle reaches 87.04%. The overall efficiency of vehicle is 29.72% at highspeed condition, which is the most energy-saving condition. The global optimization is carried out for the typical cycle operating condition of WLTC-LM that represents the actual road operation. According to the simulation results, the energy consumption per hundred kilometers of vehicle reduces by 3.98%.